Spring Festival travel rush: busiest time for police dog "Long Ya"

Police dog "Long Ya" checks train K112 with its trainer Ren Wei at Guiyang Railway Station in Guiyang, capital of southwest China's Guizhou Province, Feb. 16, 2018. The 7-year-old police dog "Long Ya" has been in service for over 6 years. The period of the Spring Festival travel rush is the busiest time for "Long Ya" in a year. (Xinhua/Ou Dongqu)